Carbureter.



V PATBNTBD JAN. 21

BIO/877,136.

A. C. STEWART.

OARBURETBR.

APPLICATION I'I-LED MAB..7, 1906.

UNITED srnrns PATENT trio.

ALFRED G. STEWART, O F LOS ANGELES CALIFORNIA;

cannon-Erna.

No. 877 ,18'6. I Specification of Letters Patent. Patented Jan. 21,1908. Application filed March 7. 1906- Serial No. 304,651,

' To all whom it may concern: faces of the flanges and 16 form acentinul 3e it known that I, ALFRED O. S'rnwnnn'a ous cylindricalsurface or wall for -the oil citlzen ofthe United States, residing'atLos chamber, wherein a float 14 rises and falls, Angeles, 1n the countyof Los'Angeles and The plug 7 also has a central depending State ofCalifornia, have invented a new and .tubular chamber 18 extending tonear the useful Improvement in Carbureters, of which bottom of the oilchamber, the float 14 being .the following is a specification. annularto fit and slide on said tubular por- This invention relates to animprovement tion of the plug. Said tubular'portion ison the ca'rbureterdisclosed in my applica- .perforated as at 19, 20, to enable retardedtion, Serial No. 244,337, filed Feb. 6, 1905, movement-of thevalvespindle mearistherethe main object of the present invention bein ashereinafter set forth, these elements ing to make the carbureter morecompact, acting as a dash pot. Flange 5 is recessed simple and cheap.below the screw-threaded portion 17 to A further object of the inventionis\to proform an annular oil passage 22 which comvid for more effectualvaporization 'of the municates with the oil chamber through a oil andintermingling thereof of the mixture. duct 23 leading from said passage22 down- The accompanying drawings illustrate the wardly in, the flange5 and communicating invention. laterally by a duct 23 with the lowerpart of Figure 1 is a verticalsection. Fig. 2 is a the oil chamber, aneedle valve 24 being pro- 7 5 side-elevation partly broken away. Fig. 3'vided to close, open; or regulate said duct,

is a section on the line se -a in Fig. 1'. Fig. said valve having ahandle 24' 4- is a section on the line ac -00 in Fig. 1. -25 designatesan outlet or drainage duct Fig. 5 is a section on the line w a:" inFig. 1. for the oil chamber having a screw closure The device com risesa casing or body 1 26. From the annular passage 22 one or formedsubstan'tia y as an open topped cup more-ducts 27 lead upwardly throughthe havin a cylindrical upper portion screwscrew-threaded portion 17 tothe top of threat ed to receive a screw cap 2 and having flange 5, andthe screw plug 7 has a shoulder a rounded lower portion which is bowedor 28 which extends outwardly over the top of swelled outwardly from theupper portion the flange'5 and sufliciently above the same 5 'to formthe outer wallof an air inlet chamto form a narrow annular oil dischargeslit 7 her 3, said chamber communicating with the 29 which communicateswith the passa e 22- outer. air through an inlet '0 ening 4. A throughthe ducts 27 aforesaidaidducts flange 5 extendingup from t e'bottom of27 are formed by flattening or cutting away body 1 forming an interioroil chamber 6, the threads '17 on the inner flange 16.

let duct or opening 8 is formed in the cap or within the cylindricalupper portion of the cover 2 and communicates with the intake body 1, asplit packing ring 31 fitting in an of an explosion en ine or othermeans for annular groove 30 in said valve member.

closed at the top by a screw plug 7. All out} The valve member 30 is-tbular and slides I producing suction t ough said opening. This valvemember separates the air inlet or 9 designates the oil supply pipeentering supply'chamber 3 from the mixing chamber a screw collar 10screwing onto a'chamber ll '46, the tubular valve wall forming the innerat the bottom of the body '1, anda strainer 12 wall of the chamber 3 andthe outer wall for beinghplaced at the bottom ofsaid chamber .the upperportion of chamber 46. At its and eld in lace ,bythe. screw collar'lO.lower end t e tubular valve member has an The bottom of the body 1 has aduct or open-' upwardly flaring peripheral portion 32 which ing 13establishin communication from the enters within the circular valve seat33 I pipe. 9 to the oil 0 amber 6. Oil chamber 6 formed as a flangeextending inwardly fromv contains a float .14 carrying a valve 15 forthe swelled-out portion of the body 1 below closing or opening the duct13, to maintain a the inlet chamber 4, the s ace between this 5 definitelevel of oil in said chamber. Screw flared valve portion and t e saidseat form.-

'plug 7 has an annular flange 17 which is ing an annular air inlet.Above said flared screw-threaded at 17' to enga e a ,screw portion thevalve member has ashoulder 34- thread on the inner face of t e, annularwhich, when the valve is lowered, comes flange 5, said screw-threadedportion of'the against the topofthe-seat ring to close the flange 5being of lar er diameter than the inlet. At its 11 per end the valve"member lower portion of the ange so that the inner is provided wit arms35- forming a spider 20 vided for controlling the area of the outlet,

connecting it 'to a cylindrical s indle .36

which travels vertically in the tubu ar chamber 18 within the oilchamber, whereby the valve is guided in its vertical movement.

The arms 35 work in vertical slots 37 in the upper portion of the screwplug 7 ,said upper portion bein formed as an annular flange in I whichsaid s otsextend radially. The outer face of the tubular plug 7 and theopposing inner face of the valve member 30 are formed W'itll upwardlytapering deflector faces 38,

39, so that as the valve member is raised or lowered, the distancebetween said members 1s increased or decreased. Said surfaces are alsopreferably grooved or provided with an,

nular horizontal ridges as indicated, to in crease the surface exposedto the mixture passing between the same and to baffle or defleet theture as it' passes therethrough.

At thetop of the casing means are prosaid means consisting'of a disk 40pivoted centrally to the top member 2 and having an operating handle 41extending through a slot 42 in the wall of the cap 2, said diskihaving aseries of perforations 43 which in theangular movement of the disk moveinto and out of register with perforations 44in the chamber 47 above themixing chamber and the valve, and an outlet chamber 45 above the suctionchamber.

49 designates an overflow and vent tube extending through the bottom ofeasing 1 to the level of the liquid in the oil chamber.

The operation is as follows 'I he device being connected to an oilsupply at 9 and to a suctional connection, such as the intake of a gasengine at the outlet 8, each suctional impulse will draw acurrent of airthrough the inlet 4 into the chamberB. The partial vacuum in the suctionchamber 47 in the upper part of the casing 1 causes the valve member 30to move upwardly in proportion to the amount of suction, opening thepassage between the valve portion 32 and the valve seat 33 and betweenthe valve deflector surfaces 38, 39, so that air can pass from the inlet4 down through the air inlet between valve portions 33, 33, 'into thechamber 46.at the bottom of easing 1 and then upwardly within the valvemember 30 and around the fixed flange 5 and between the valve surfaces38, 39, and so into the chamber 47 at the top of the casing 1, fromwhich it passes through the openings 44 into cham- "ber 45 and theoutlet 8.

The oil passes in from pipe 9 into chamber 11 and through the duct 13into the oil chamber 6, th float 14 serving to close the inletcommunication at 13 when the oil chamber fills to a certain I level,this level being substantially the level 'of the oil outlet 29, orslightly below the same, so that oil must be drawn through said outletby suction. Valve 24 being open, oil flows through duct 23 from oilchamber 6 to passage 22 and thence through duct 23 to the annular oiloutlet 29, the oil as it flows over the lip of said oil outlet 29 beingcaught and entrained by the upwardly passing ,cur-

rent of air passing between the valve mem- 1 her 30 and theflange 5.Above this point where the oil is taken upby the air the pas sagecontracts, the deflector faces 38, 39 being sufficiently close to causeacceleration of the mixture as it passes between them, and the ridgeson'said surfaces serve to bathe or deflect the mixture as it passesupwardly and insure more complete commingling and vaporization. Theconstriction of this outlet passage for the mixture is proportional tothe constriction-of the inlet passage for as it moves upwardly openingboth of said the air at the bottom of the valve, said valve passagesproportlonately or corresponrhnglyso that the velocity of exit remainsapproximately constantand uniform conditions of mixture are attained. Itwill be understood that the amount ofoil flowing from the oil outletwill be proportional to the condition of suction existing at the oiloutlet which is proportional to the suction at outlet 8. The upward liftof the valve member 30 is also proportional to the amount of thissuction at passing in proportion to the suctional effect 7 and thereforein proportion to the amount of oil supplied, without materially changingthe velocity, so that the condition for substantially uniform mixtureunder all speedsv and loads is attained.

What I claim is v 1. A carburetor comprising an inner oil chamberprovided with an inlet valve, a casing surrounding the oil chamber, anair inlet to said casing and provided with a valve seat, said oilchamber being provided with an outlet opening, a deflectonabove saidoutlet, anda valve surrounding the oil chamber and'guided to movevertically in the casing and forming therewith and with the oilchamberan air inlet chamber and a mixing chamber, said valve havlngaportlon spondence.

2. A carbureter comprising an inner oil chamber provided with an inletvalve, a float crating with the aforesaid deflector, to'varvautomatically controlling said inlet valve, a casing surrounding the oilchamber, an air inlet to said casing and provided with a valve seat,said oil chamber being provided with an outlet opening, a deflectorabove said outlet, and a valve surrounding the oil chamber and guided tomove vertically in the casing and forming therewith and with the oilchamber an air inlet chamber and a mixing chamber, said-valve having aportion cooperating with said valve seat and a deflector portioncooperating with the atoresaid deflector, to vary the size of the airinlet opening into the mixing chamber, and the outlet from the mixingchamber in correspondence.

3. A carbureter comprising an inner oil chamber provided with an inletvalve, a casing surrounding the oil chamber, an air inlet to said casingand provided with a valve seat, said oil chamber being provided with anoutlet opening, a deflector above said outlet, and a valve surroundingthe oil chamber and guided to move vertically in the casing and formingtherewith and with the oil chamber an air inlet chamber and a mixingchamber, said valve having a portion cor'iperating with said valve seatand a deflector portion coopthe size of the air inlet opening into themixing chamber, and the outlet from the mixing chamber incorrespondence, and a suction chamber above the mixing chamber, thevalve member being exposed in said suction chamber to be lifted by thesuction therein.

4. A carbureter comprising an inner oilchamber provided with an mlctvalve, afloat automatically controlling said inlet valve, 'a casingsurrounding the oil chamber, an air inlet to said casing and providedwith a valve seat, said oil chamber being provided with an outletopening, a deflector above said outlet, and a valve. surrounding the oilchamber and guided to move 'erticallyin the casing and formingtlu-u'ewith and with the oil chamber an air inlet chamber and a mixingchamber, said valve having a portion cooperating with said valve seatand a deflector portion cooperating with the aforesaid deflector, tovary the size of the air inlet opening into the mixing chamber, and theoutlet from the mixing chamber in correspondence, and a suction chamberabove the mixing chamber, the valve member being exposed iii saidsuctionchamber to be lifted by the suc tion therein.

5. A carbureter comprising a casing having an annular flange extendingup from the bot- ,isc

toward the oil chamber, and a valve member "sliding in the casing andhaving a tapering portion inwardly of said lip, and a tapering portionat its upperpart, and a tapering deflector member supported in. thecasing adj acent to the upper tapering portion of the valve member.

6. A carbureter comprising a casing having a cylindrical upper part, aninterior oil chamber in its lower part, a circular valve lip in itslower part and an annular valve member sliding in said cylindrical partand forming with the casing an air inlet chamber above said valve lipand cooperating with the valve lip to control passage of air from saidair inlet chamber into the interior of the valve 1nemher, the casingbeing provided above the valve member with an exhaust outlet to applysuction to the space within the casing above the valve member to liftsaid member, said valve member opening upwardly into said space to allowsuction of mixture into such space.

7. A carbureter com prising a casinghaving a cylindrical up er portionand a flange exa cylindrical oil chamber, a lug screwed into said flangeand'having a tu ular portion extending downwardly into the oll chamberand perforated for the passage of oil therethrough, said flange and plugbeing formed with an annular passage at the top of said flange and witha duct leading to saidpassage from the oil chamber, a valve for saidduct, an annular float in'the oil chamber surrounding said tubular{portionof the plug, a valve carried by said oat, an oil supply chambercommunicating with. the oil cham ber through an opening controlledbysaid valve, and a valve member slidable in the upper cylindricalportion of the casing and having a cylindrical extension working in thetubular portion of the plug.

8. A carbureter comprising a casing having a cylindrical upper portionand a flange extending upwardly from its bottom forming a cylindricaloil chamber, a lug screwed into said flange and having a tu ular portionextending downwardly into the 011 chamber and perforated for the passageof' oil therethrough, said flange and plug being formed with an annularpassage at the top of-said flange and with aduct leading to said passagel rom the oil chamber, a valve for said duct, an annular float in theoil chamber surrounding said tubular portion of the lug, a valve carriedand operated by said oat, an oil supply chamber communicating withhaving a circular valve extending inwardly tending upward y-l'roin itsbottom forming theioil chamber through an opening controlled of the plugand provided interiorly With an by said float operated valve, and avalve upwardly tapering ribbed portion opposing member slidable 1n theupper cylindrical orthe ribbed portion of the plug. I

' tion of the casing and havin a cylindrica eX- In testimony whereof, Ihave hereunto set 5 tension Working in the tubular portion of my hand atLos Angeles California this 26th 15 the plug, the said plug being formedexteriorly r day of February 1906.

with a ribbed upwardly tapering face and ALFRED C. STEWART. having itsupper portion in the form of a ver- In presence ol" v tically slottedflange, and the valve member ARTHUR P. KNIGHT,

10 having a spider portion extending in the slots VERNA A. TALBERT.

